| .. SPDX-License-Identifier: GPL-2.0 |
| |
| ===== |
| BTRFS |
| ===== |
| |
| Btrfs is a copy on write filesystem for Linux aimed at implementing advanced |
| features while focusing on fault tolerance, repair and easy administration. |
| Jointly developed by several companies, licensed under the GPL and open for |
| contribution from anyone. |
| |
| The main Btrfs features include: |
| |
| * Extent based file storage (2^64 max file size) |
| * Space efficient packing of small files |
| * Space efficient indexed directories |
| * Dynamic inode allocation |
| * Writable snapshots |
| * Subvolumes (separate internal filesystem roots) |
| * Object level mirroring and striping |
| * Checksums on data and metadata (multiple algorithms available) |
| * Compression (multiple algorithms available) |
| * Reflink, deduplication |
| * Scrub (on-line checksum verification) |
| * Hierarchical quota groups (subvolume and snapshot support) |
| * Integrated multiple device support, with several raid algorithms |
| * Offline filesystem check |
| * Efficient incremental backup and FS mirroring (send/receive) |
| * Trim/discard |
| * Online filesystem defragmentation |
| * Swapfile support |
| * Zoned mode |
| * Read/write metadata verification |
| * Online resize (shrink, grow) |
| |
| For more information please refer to the documentation site or wiki |
| |
| https://btrfs.readthedocs.io |
| |
| https://btrfs.wiki.kernel.org |
| |
| that maintains information about administration tasks, frequently asked |
| questions, use cases, mount options, comprehensible changelogs, features, |
| manual pages, source code repositories, contacts etc. |
